liquid
![The ferrofluid activity components including the signs, guides, tubes of ferrofluid, and magnets.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/ferrofluid.jpg?h=b7e224f1&itok=b54gJpf1)
Exploring Materials - Ferrofluid
In this activity, learners investigate the properties of ferrofluid and magnetic black sand, learning that the surprising difference in the behavior of these two materials is due to size.
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![](https://nisenet.org/sites/default/files/styles/curated_list_large/public/images/catalog/12567/liquid_crystal_nise.jpg?itok=RfWHeCaH)
Scientific Image - Liquid Crystal
Magnified image of liquid crystal using an Optical Microscope.
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![Nano ice cream activity Mr. O video schreenshot showing presenter wearing safety goggles and gloves](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-07/nano_ice_cream_activity_mr._o_video_schreenshot_showing_presenter_wearing_safety_goggles_and_gloves.png?h=b474a7cd&itok=bNui-5jK)
Nano Ice Cream
In this public presentation, a presenter will demonstrate how liquid nitrogen cools a creamy mixture at such a rapid rate that it precipitates super fine grained (nano) ice cream.
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